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RPMs - Help Settle a Debate

Discussion in 'General Automotive' started by AeroCooper, Apr 24, 2013.

?

Using Fuel or No?

  1. The Injectors Cut Off - Zero Fuel Used

    11 vote(s)
    28.2%
  2. The Engine Needs Fuel To Not Stall - Fuel Used

    28 vote(s)
    71.8%
  1. Sep 6, 2013 at 8:08 AM
    #21
    tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    What I miss with DFCO is backfiring while decelerating. My 1988 4 cylinder Toyota Pickup was the last year with regular carburetor, and it sounded really cool! :)
     
  2. Sep 6, 2013 at 9:30 PM
    #22
    Del Scorcho

    Del Scorcho O-------l

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    Nope...
    Huh. I'll have to take a look at that. When it comes to that kind of information, isn't the scangauge just displaying what the ECU actually doing? If it can't get that right then the MPG ACT & AVE will be off as well. To get an instant MPG read out, it's just taking real time GPH and factoring in the instant MPH. Then over time, creating an average.
     
  3. Sep 6, 2013 at 9:34 PM
    #23
    User Name01

    User Name01 Well-Known Member

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    mehh
    I know that in the Chevy Tahoe/Yukon versions in Mexico, two of the injectors in the v8 shut off when coasting(downhill/straight highway) becomes a "v6"
     
  4. Sep 6, 2013 at 10:34 PM
    #24
    worthywads

    worthywads Well-Known Member

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    Not sure how, but the scangauge is estimating GPH, there is no direct fuel use from OBDII. Must be pretty accurate most of the time, but not with DFCO, and since that isn't a large percentage of total run time it gets adjusted by the fuel adjustment.
     
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